The Concrete operational stage is
the third of four stages of cognitive
development in Piaget’s theory.
This stage, which follows the
Preoperational stage, occurs
between the ages of 7 and 11 years and
is characterized by the appropriate
use of logic. Important processes
during this stage are:

Seriation
Classification
Decentering
Reversibility
Conservation
Elimination of Egocentrism

THE CONSCIOUSNESS OF BEING.
UNCONSCIOUS.